*{font-size:14px;padding:0;margin:0;}
body{background:url(bg.jpg) center center no-repeat;}
img{border:none;}
.box{width:758px;margin:0 auto;}
.but{width:170px;height:45px;margin:374px 0 0 304px;background:url(but.jpg) center center no-repeat;}
.footer{height:40px;line-height:50px;text-align:center;margin:270px 0 0 30px;font-size:14px;font-family:"微软雅黑";color:#fff;}